Who was Arthur Miller and why did he write The Crucible?

Biography of Arthur Miller
http://www.biography.com/people/arthur-miller-9408335
http://www.pbs.org/wnet/americanmasters/arthur-miller-none-without-sin/56/
http://www.neh.gov/about/awards/jefferson-lecture/arthur-miller-biography
http://www.historytoday.com/richard-cavendish/marilyn-monroe-marries-arthur-miller

Arthur Miller on Why He Wrote The Crucible (This is a key component to understanding McCarthyism as it relates to the play The Crucible.)
http://law2.umkc.edu/faculty/projects/ftrials/salem/sal_cru.htm
http://www.writing.upenn.edu/~afilreis/50s/miller-mccarthyism.html

Reflections on the Importance of Understanding McCarthyism
http://prospect.org/article/exhuming-mccarthy